====== Transforming variables ======

To group the variable ''Date'' into a new variable ''Period'':

<code C>> Period <- Date
> Period[(Date>650)&(Date<=1200)] <- 1
> Period[(Date>100)&(Date<=650)] <- 2
> Period[(Date<=100)] <- 3
> table(Period)
Period
 1  2  3 
20 18  2 
</code>
<code C>> barplot(table(Period))</code>
<code C>> barplot(table(Mat,Period), beside=TRUE)</code>

To create the new variable "maximum length / maximum width ratio", ''Lewirat'':

<code C>> Lewirat <- Maxle/Maxwi</code>

To create the new variable "socket length as percentage of maximum length", ''Socperc'':

<code C>> Socperc <- (Socle/Maxle)*100</code>


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[[Start]] · [[Data description]] · **Transforming variables** · [[Tables]] · [[Pictorial displays]] · [[Measures of position and variability]] · [[Sampling]] · [[Tests of difference]] · [[Tests of distribution]] · [[Correlation]] · [[Tests of association]]